Peter t



(Nb Model.)

P. T. COPFIELD.

MECHANICAL MOVEMENT.

No. 253,680. Patented Feb. 14,1882,

WW 'u PATENT PETER- T. OOFFIELD, OF SPRINGFIELD, OHIO, ASSIGNOR OF ONE-HALF TO CHARLES H. PAXSON, OF SAME PLACE.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 253,680, dated February 14, 1882.

Application filed January 3, 1882. (No model.)

To all whom "it may concern Be it known that I, PETER T. OoFFInLD, of Springfield, in the county of Clarke and State of Ohio, have invented certain Improvements in Mechanical Movements, of which the following is a specification.

This invention relates to means for transmitting a rotary motion from one shaft to another through intermediate reciprocating delo vices. The invention is applicablein all cases in which it is desired to secure the above result, but is more particularly designed for use in connection with wind-wheels, in order to communicate motion from a wind-wheel shaft 1 mounted in a revolvinghead to ashat't mounted in stationary hearings, to avoid the difficulty which ordinarily exists in geared mills on account of the mill having a tendency to turn itself out of the wind as the power exerted increases.

The invention consists substantially in combining with a reciprocating rod an angular lever, one end of which is mounted on a crank, and which is pivoted to a reciprocating support carried by a second and independently sliding rod, as hereinafter more fully explained.

Referring to the accompanying drawings, Figure 1 represents a side elevation of the I mechanism; Fig. 2, a top plan view ofthe same; 0 Fig. 3, an elevation of the mechanism looking in a plane at right angles to thatin which Figs. 1 and 2 are shown.

Referring to the drawings, A represents the 7 horizontal shaft upon which the wind-wheel will be mounted, as usual. The shaft A is mounted in bearings fixed upon the horizontal revolving head or turn-table B, which may be of the same construction as the ordinary swivelhead or turn-tables for supporting windmills.

0 represents the lower or driven shaft,

mounted in fixed bearings below the shaft A.

D represents acrank secured to the drivingshaft A and journaled to the lower end of an elbow-lever, E, which lever is pivoted at F to 4 5 a vertical sliding head, G, supported on a vertical guide-rod, H, secured rigidly to the millhead or support B. The rotation of the crank causes the lever to rise and fall, and at the same time to swing upon its fulcrum F, the

slide G rising and falling with the lever.

To the outer or free end of the leverF, I connect by a swivel or universal joint, I, the upper end of a vertical reciprocating rod, J, which is moved upward and downward bythe motion of the angular lever. To the vertically;

sliding head F, which is provided at its lower end with a lateral arm for the purpose, I secure byaswivel-joint the upper end ofa tubularreciprocating rod, K, which surrounds and slides freely upon the rod J.

To the lower end ot' the rod J, I connect by a horizontal pivot one end of an elbow-lever,

L, which is pivoted at M to a vertical sliding head, N, mounted on the rigid guide-rod O.

The lower end of the reciprocating rod' K, I 6 5 connect by. an intermediate bar, P, or otherwise, to the lower reciprocating head, N, on which the angular lever L is mounted.- The lower end of the angular lever L is journaled upon a crank, It, secured to the end of the lower or driven shaft, 0.

Theparts, being constructed as above, operate as follows: The rotation of the upper crank, D, vibrates the upper lever, E, and at the same time moves the same bodily upward and downward. The movement of the lever causes the rod J to reciprocate, and also, through its connection with the head G, causes the rod K to be reciprocated, the two rods moving, however, independently and difl'eren- 8o tially. The rod K moves the lower head, N, and the fulcrum M of the lower lever upward and downward, and at the same time the reciprocation of the rod J causes said lower lever to vibrate upon its fulcrum, the resultot' which is that the lower end of the lever L is caused to describe a circular path, and thereby revolve the lower crank and its shaft. In this way a rotary motion is positively transmitted from the upper crank to the lower through the medium ot' thetwo reciprocating rods. Owing to the swivel-connection between the upper lever and the two rods, the driving-shaft and its support B are allowed to revolve freely in a horizontal direction without in the slightest de gree interfering with the operation of the other parts. It will also be observed that the resistance offered to the motion of the lower shaft has no effect whatever upon the position of the revolving head B or of the windmill mounted thereon.

It is manifest that the details of construction may be modified as desired. The swivel-joint may be placed at the lower end of the apparatus instead of at the top, as preferred. The joint may be varied in construction, and the form and arrangement of the guides, sliding heads, and other parts maybe modified as circumstances may render advisable without departing from the limits of the invention, provided the mode of action above described is retained. When the mechanism is to be employed in places where the upper shaft-support is stationary the swivel-joints may be omitted.

Having thus described the invention, what is claimed is 1. In combination with the two cranks, the two reciprocating rods, the angular levers, and the sliding heads to which the levers are attached.

2. A mechanism for imparting a rotary motion to a crank, consistingin an angular vibrating lever mounted upon a reciprocating fulcrum. v

3. The combination, with the driven crank, of the angular lever, the reciprocating red attached thereto, and the sliding fulcrum for said angular lever.

4. In combination with two cranks, two levers mounted upon the respective cranks, a connecting-rod between said levers, and positively-actuated sliding fulcrums supporting said levers, substantially as described and shown.

5. In combination with the driven crank, the angular lever connected thereto, and the sliding fulcrum for said lever, the connectingrods J K, connected by swivel-joints to the sliding fulcrum, and angular lever connected with the driving-crank.

6. In combination with the driving-crank, the vertical guide H, reciprocating slide G, angular lever E, rods J K, guide 0, slide N, lever L, and crank It;

' PETER TENNEY OOFFIELD.

Witnesses:

H. S. SHOWERS, JNo. M. SPEGK; 

